LeetCode SQL50 Solutions 🚀

I have completed LeetCode SQL50 and pushed all the solved solutions per section on GitHub.

New Topics / Syntax / Learnings 📚

1️⃣ IFNULL() Function

The IFNULL() function returns a specified value if the expression is NULL. The IFNULL() function returns a specified value if the expression is NULL. IFNULL(expression, alt_value) expression(Required)- The expression to test whether is NULL alt_value(Required)- The value to return if the expression is NULL

🔹 Syntax:

SELECT IFNULL(( -- Subquery here ), NULL) AS num;